黄土高原子午岭森林碳储量与碳密度研究  

Carbon Storage and Density of Forests in Ziwuling Area of Loess Plateau

作　　者：杨晓梅[1] 程积民[1] 孟蕾[2] 韩娟娟[2] 

机构地区：[1]中国科学院水利部水土保持研究所,陕西杨凌712100 [2]西北农林科技大学动物科技学院,陕西杨凌712100

出　　处：《水土保持学报》2010年第6期123-126,131,共5页Journal of Soil and Water Conservation

基　　金：中国科学院重要方向项目(KZCX2-YW-441;KZCX2-YW-149);国家重点基础研究发展计划"973"项目(2007CB106803)

摘　　要：基于样地林分调查与室内分析,运用清查平均生物量法和林木相对生长模型,研究了黄土高原子午岭林区3种森林碳储量及碳密度空间分布特征。结果表明:研究区森林生态系统植被含碳率变化范围为0.331 6～0.553 2 g/g;变异系数介于2%～14%,而枯落层含碳率为0.294 8～0.335 9 g/g;3种林地平均碳密度:柴松林为238.22 t/hm2,辽东栎林为235.75 t/hm2,油松林为191.58 t/hm2,柴松林及辽东栎林碳密度约是油松林的1.24倍;从研究空间尺度上土壤层>植被层>枯落层,其碳密度分别为105.21,88.11,28.53 t/hm2,其中植被层各分层碳密度大小差异显著,而土壤层碳密度随着土壤深度的增加而递减;3种森林生态系统有机碳库总储碳量为31.70 Tg,其中土壤层碳储量占整个碳库的49%,是植被层和枯落层碳储量的1.3倍和3.5倍,且碳储量空间分布呈现出:土壤层>乔木层>枯枝落叶层>灌木层>草本层。Based on the method of average biomass inventory,using trees relative growth model,as well as forest research,we studied the spatial distribution characteristics of typical forests ecosystem carbon storage in Ziwuling forest area of Loess Plateau.The results showed that： The carbon concentration in vegetation layers ranged from 0.331 6 g/g to 0.553 2 g/g,with coefficient of variation between 2% and 14%.The carbon concentration in litter layers ranged from 0.294 8 g/g to 0.335 9 g/g.The integrated feature of carbon density is that： Pinus shekannesis（238.22 t/hm2） and Quercus liaotungensis（235.75 t/hm2） are 1.24 times than P.tabulaeformis（191.58 t/hm2）.In spatial scale,carbon density was 105.21 t/hm2 for soil layer,88.11 t/hm2 for vegetation,and 28.53 t/hm2 for litter.Furthermore,in vegetation layer,the carbon density has great significant different among hierarchical layers,and in soil layer,with the depth of soil,the carbon density gradually decreased.In the areas,total carbon storage of in forests was 31.70 Tg,of which soil layer represented 49% and was 1.3 times and 3.5 times of vegetation and litter layers,respectively.The distribution of carbon storage was ranked in order of soil layers tree layerlittershrub layerherb layer.

关 键 词：森林生态系统 有机碳密度 碳储量 黄土高原 子午岭 

分 类 号：S718.5[农业科学—林学]